<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>测试网页</title>
</head>
<body>
<h1>登陆页面</h1>
用户名:<input id = "username" type="text" value="请输入用户名">
密码:<input id = "password" type="password" value="请输入密码">
</body>
</html>